Former Venezuelan President Hugo Chávez holds up a map of the South American continent while responding to the press about Latin American regional unity in Mar del Plata, Argentina, November 2005. Photo: AP/Eraldo Peres.

Former Venezuelan President Hugo Chávez holds up a map of the South American continent while responding to the press about Latin American regional unity in Mar del Plata, Argentina, November 2005. Photo: AP/Eraldo Peres.